这有什么问题?我预计,如果我应用d = 30的颜色,它会比d = 0更亮。但事实并非如此。这里颜色应该从一个面板变为面板(我预期)。
package default;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class test
{
public static void main(String[] args)
{
JFrame frame = new JFrame();
JPanel panel = new JPanel();
frame.getContentPane().add(panel);
frame.setMinimumSize(new Dimension(600,100));
panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
for(int i = 100; i > 0; i = i-10)
{
JPanel p = new JPanel();
p.setPreferredSize(new Dimension(20,20));
p.add(new JLabel(String.valueOf(i)));
Double d = Double.valueOf(i);
Color color = Color.red.brighter();
while(d > 0)
{
color = color.brighter();
d = d-5;
}
p.setBackground(color);
panel.add(p);
}
frame.setVisible(true);
}
}
答案 0 :(得分:4)
Java的brighter()
颜色算法假设如果R,G或B从0开始,则它保持为0.“没有百万倍,仍然没有。”
import java.awt.Color;
public class QuickTest {
public static void brighten(Color color, int d) {
System.out.println("brighten");
while(d > 0)
{
System.out.println(color);
color = color.brighter();
d = d-1;
}
System.out.println(color);
}
public static void main(String[] args) throws Exception {
int d = 3;
brighten(Color.red,3);
brighten(new Color(45,125,0),3);
brighten(new Color(45,125,1),3);
}
}
brighten
java.awt.Color[r=255,g=0,b=0]
java.awt.Color[r=255,g=0,b=0]
java.awt.Color[r=255,g=0,b=0]
java.awt.Color[r=255,g=0,b=0]
brighten
java.awt.Color[r=45,g=125,b=0]
java.awt.Color[r=64,g=178,b=0]
java.awt.Color[r=91,g=254,b=0]
java.awt.Color[r=130,g=255,b=0]
brighten
java.awt.Color[r=45,g=125,b=1]
java.awt.Color[r=64,g=178,b=4]
java.awt.Color[r=91,g=254,b=5]
java.awt.Color[r=130,g=255,b=7]
但并非总是......
brighten(new Color(0,0,0),3);
..生产:
brighten
java.awt.Color[r=0,g=0,b=0]
java.awt.Color[r=3,g=3,b=3]
java.awt.Color[r=4,g=4,b=4]
java.awt.Color[r=5,g=5,b=5]